Certificate of Completion

Love the Lungs You re With 630-325-4443 800-244-4242 Certificate of Completion Every parent or guardian is notified that this facility has performed radon measurements to ensure the health and safety of the occupants. The Illinois Emergency Management Agency (IEMA) recommends that all residential homes be tested and that corrective actions be taken at levels equal to or greater than 4.0 pci/l. is a Class A human carcinogen, the leading cause of lung cancer in nonsmokers, and the second leading cause of lung cancer overall. For additional information about this facility, contact the licensee, and for additional information regarding radon contact the IEMA Program at 800-325-1245 or on the Internet at www.radon.illinois.gov. Commercial Survey Report Site Address: 435 W Cuba Road Lake Zurich, Illinois 60047 Survey Date: March 6, 2017 to March 10, 2017 Initial Certificate of Completion Expiration Date: March 9, 2020 Kirsten Schmidt Professional IL License RNI2006204

Survey Date: 3/6/17 to 3/10/17 page 2 of 22 Contents 1.0 Basics of and Health Impacts 2.0 Scope of Work 3.0 Explanation of Quality Assurance Plan for this Site 4.0 Explanation of Device Results and Site Notes 5.0 Survey Summary and Recommendations Appendices 1.0 Appendix A: Site Plan Showing Device Locations 2.0 3.0 Appendix C: License and Credential Documentation Detection Specialists is licensed for both residential and commercial radon testing in Illinois. For more information regarding radon testing and mitigation practices in the state of Illinois, please visit the Illinois Emergency Management Agency Department of Nuclear Safety s website, www.radon.illinois.gov, or call the state of Illinois Program at 217-782-1325.

Survey Date: 3/6/17 to 3/10/17 page 3 of 22 Section 1.0 Basics of and Health Impacts is recognized by the Environmental Protection Agency as well as the scientific and medical communities as a Class A carcinogen, accounting for 15,000 22,000 lung cancer deaths annually. to radon gas is the leading cause of lung cancer among non-smokers. is a naturally occurring, radioactive gas which comes from the soil. It can t be seen, smelled or tasted. The only way to know if the level of radon gas in your building exceeds the recommended Action of 4.0 pci/l is to test. The Department of Nuclear Safety in Illinois requires those testing for radon in commercial buildings, schools and multi-family housing communities, as well as individual residences, to be properly licensed. The amount of radon in the soil depends on soil chemistry, which naturally varies. levels in the soil can range from a few hundred to several thousands of pci/l (pico Curies per liter of air). The amount of radon that escapes from the soil and enters the building depends on the weather, soil porosity, soil moisture, and the suction within the building. is the leading cause of lung cancer among non-smokers. There is no safe level of radon exposure. Any exposure causes some risk of developing cancer. The National Academy of Sciences (NAS) concluded that only cigarette smoking poses a greater risk. to radon accounts for 10% of all lung cancer deaths annually. As we breathe, the alpha radiation from radon and its decay products cause damage to the sensitive lung tissue. Most of the radiation dose is not actually from radon itself, but rather from radon s chain of short-lived decay products that are inhaled and lodge in the airways of the lungs. These radionuclides decay quickly, producing other radionuclides that continue damaging the lung tissue. Those particles that are retained long enough release radiation and damage the surrounding lung tissue. It is this damage that can lead to lung cancer. What other health risks are related to radon exposure? No other respiratory ailments are linked to radon exposure. There are preliminary studies that are looking at the link between radon exposure and the development of Parkinson s and Alzheimer s disease. These are early studies, and research is on-going.

Survey Date: 3/6/17 to 3/10/17 page 4 of 22 Section 2.0 Scope of Work Performed: At the request of Lyle Erstad, Detection Specialists performed an initial short-term radon measurement at the Middle School South, located at 435 W Cuba Road, Lake Zurich, Illinois. This scope of work included a 4-day (short-term) radon test in all classrooms, offices and common use spaces of the subject building. A total of 119 passive devices were deployed. Of the 119 passive devices deployed, 100 were single measurements, 12 were duplicates and 7 were blanks. This measurement was conducted from Monday, March 6, 2017 to Friday, March 10, 2017. The devices used were electret ionization chambers (Eperms ) manufactured by Rad Elec, Inc. The report includes a table that details all device measurement results. Because radon levels fluctuate hourly, daily, weekly, seasonally and yearly, these results should not be used to estimate radon levels of rooms that were not measured, or to estimate future radon levels of rooms that were measured. Changes to the building components (both structural and mechanical) can affect radon concentrations. Duplicate devices have been averaged together and demonstrate the precision of the measurements. The testing was conducted in accordance with the Illinois Emergency Management Agency Division of Nuclear Safety (IEMA) and the United States Environmental Protection Agency (USEPA) testing protocols for commercial radon measurements, the device manufacturer s recommendations, and the RDS Quality Assurance Plan.

Survey Date: 3/6/17 to 3/10/17 page 5 of 22 Section 3.0 Quality Assurance Plan for this Site Pre-Deployment Testing Strategy s will be conducted in all classrooms, offices and common use spaces of the subject building. A minimum of 1 detector will be placed every 2000 square feet in open areas. s will not be conducted in rooms that are not frequently occupied such as closets, storage rooms, restrooms, hallways, and stairwells unless the space is considered alterable for future regular use, or the measurement is taken for diagnostic purposes. Materials and Methods RDS will use electret ionization chambers to measure radon levels in the air in the above referenced property. The test will comply with all protocols set forth by IEMA, as well as the RDS Quality Assurance Plan. Duplicate measurements will be conducted for not less than 10% of the total single devices placed to measure precision. Field blanks will be deployed for not less than 5% of the total number of single measurements deployed to measure background gamma radiation. Spike tests are conducted monthly by an independent lab, at a minimum of 3% for the total number of devices deployed (annually) or at a rate of 6 spikes per calendar month, to measure accuracy. The initial voltage reading will take place not more than 24 hours prior to deployment and the final voltage of the devices will be determined within 24 hours of retrieval. RDS will locate devices in such a way to limit unintentional interference from building occupants. A walk-through inspection of the building will allow RDS to document observations regarding radon entry mechanisms and general building pressure gradients. results will be reported in picocuries per liter of air.

Survey Date: 3/6/17 to 3/10/17 page 6 of 22 Section 4.0 Explanation of Device Results and Site Notes Appendix A provides a detailed drawing showing device locations, if an appropriate and accurate drawing is provided by the client and dimensional device plotting is possible. If Appendix A is blank, please refer to the Device Placement columns provided in Appendix B ( and Number) as an explanation of device locations. Appendix B identifies all the devices deployed and their reported radon levels. The results were determined using calculations supplied by the device manufacturer. The radon levels were BELOW the recommended Action of 4.0 pci/l in 100 of the 100 single locations measured. Notes Regarding Appendix B: All radon levels are expressed in picocuries per liter of air. The building was tested in accordance with IEMA, and EPA protocols with regard to device placement and analytical methods of calculating results. Tampering was not detected at the time the devices were retrieved, unless noted in the Comment Column. Devices were placed strategically to reduce accidental interference by building occupants. Duplicates are averaged together. It is the average of the two devices upon which mitigation decisions should be based. Site Notes: 1. The subject building was occupied and fully-functional during this radon measurement. 2. The testing period was noted to have been unremarkable in terms of changes/repairs to the building functionality. 3. Due to severe weather during the measurement period, the length of the test was extended to 96 hours. 4. At device deployment, windows were noted to be open in Classrooms 309, 706, 705, 802, and 94. The windows in these locations were closed at the onset of the measurement.

Survey Date: 3/6/17 to 3/10/17 page 7 of 22 5. During the measurement, Classroom 802 self-reported needing to open the windows for a shorttime due to the nature of a science experiment. It is unknown, to what extent, if any, this had on the radon levels detected. 6. At device retrieval, it was noted that Classroom 212 was inadvertently skipped. There are no results for this location. 7. At device retrieval, the testing device deployed in Classroom 404 was noted to have been prematurely closed. The results for this location are invalid.

Survey Date: 3/6/17 to 3/10/17 page 8 of 22 Section 5.0 Survey Summary The radon levels found during this short-term survey were BELOW the US EPA and IEMA Action of 4.0 pci/l in 100 of the 100 single locations measured. Recommendations For locations with invalid measurements or no measurements: Classrooms 212 and 404 It is the recommendation of this testing professional to perform another short-term survey in locations with invalid measurements or no measurements. When all levels detected are below the Action of 4.0 pci/l Best Practice in : Because different ventilation systems and varying seasonal pressures can influence radon levels, it is the recommendation of this testing professional to perform another short-term survey in three years, in an alternating season, to establish an alternate seasonal baseline. A Note About Long-Term Testing The EPA and IEMA Action of 4.0 pci/l is based upon an annual average exposure. As a matter of best practice in radon measurement, a long-term measurement is the best way to determine occupants' annual exposure, because radon levels vary hourly, daily, weekly, seasonally and over the years. Longterm testing (lasting 90 days to one year) provides a better understanding of building radon concentrations and the risks of exposure to radon. Although the results of this short-term measurement performed by an Illinois licensed testing professional were below the EPA and IEMA Action of 4.0pCi/L, to have a thorough understanding of the occupants risks of exposure, a long-term measurement is always recommended. This type of measurement will provide the best indication of radon concentrations and are the basis upon which mitigation decisions should be made. Should you choose to engage in a long-term measurement as recommended, please contact us for further details.

Survey Date: 3/6/17 to 3/10/17 page 9 of 22 Appendix A: Site Plan Showing Device Locations

Survey Date: 3/6/17 to 3/10/17 page 10 of 22 Device Placement Start Stop SHZ503 Office 100 3/6/2017 10:50 AM 375 3/10/2017 AM 360 4.05 1.3 SHN791 Principal 106 3/6/2017 10:50 AM 249 3/10/2017 AM 241 4.05 0.4 SIC015 Asst. Principal 107 3/6/2017 10:50 AM 424 3/10/2017 AM 411 4.05 1.0 SIA648 Asst. Principal 107 3/6/2017 10:55 AM 176 3/10/2017 AM 175 4.04-0.5 SIF122 Small Class 108 3/6/2017 10:55 AM 282 3/10/2017 AM 272 4.04 0.7 SIL036 Office 110 3/6/2017 10:55 AM 321 3/10/2017 AM 312 4.04 0.5 SIC238 Office 112 3/6/2017 10:55 AM 275 3/10/2017 AM 266 4.04 0.5 SIL028 Lounge 114 3/6/2017 11:00 AM 419 3/10/2017 AM 413 4.04 0.1 SIL350 Office 115 3/6/2017 11:00 AM 533 3/10/2017 AM 527 4.04 0.1 SIL529 Office 115 3/6/2017 11:00 AM 506 3/10/2017 All radon levels are expressed in picocuries per liter. AM 500 4.04 0.1 Duplicate 0.1

Survey Date: 3/6/17 to 3/10/17 page 11 of 22 Device Placement Start Stop SIA377 Conference 109 3/6/2017 1 AM 248 3/10/2017 AM 238 4.03 0.7 SJD125 Health 101 3/6/2017 1 AM 626 3/10/2017 AM 621 4.03 0.0 Below the lower limits of detection SII675 Work 105 3/6/2017 1 AM 469 3/10/2017 PM 463 4.04 0.1 SIK968 Cafeteria-N 3/6/2017 11:15 AM 284 3/10/2017 PM 277 4.03 0.3 SJD130 Cafeteria-S 3/6/2017 11:15 AM 354 3/10/2017 PM 344 4.03 0.7 SJD016 Custodial Office 200 3/6/2017 11:15 AM 590 3/10/2017 PM 580 4.03 0.6 SIL119 Kitchen Office 207 3/6/2017 1 AM 432 3/10/2017 PM 427 4.03 0.0 Below the lower limits of detection SIL126 Kitchen Rear 207 3/6/2017 1 AM 449 3/10/2017 PM 441 4.03 0.4 SIB010 Kitchen Front 207 3/6/2017 1 AM 201 3/10/2017 PM 192 4.03 0.6 SIL044 Kitchen Front 207 3/6/2017 1 AM 509 3/10/2017 All radon levels are expressed in picocuries per liter. PM 502 4.03 0.2 Duplicate 0.4

Survey Date: 3/6/17 to 3/10/17 page 12 of 22 Device Placement Start Stop SIA483 Kitchen Serving 207 3/6/2017 1 AM 398 3/10/2017 PM 388 4.03 0.6 SIF175 Loading Dock 224 3/6/2017 1 AM 248 3/10/2017 PM 239 4.03 0.6 SIF147 Kitchen East 207 3/6/2017 1 AM 358 3/10/2017 PM 346 4.03 0.9 SIC106 Storage Dry 207 3/6/2017 1 AM 220 3/10/2017 PM 212 4.03 0.4 SIF109 Classroom 209 3/6/2017 11:30 AM 340 3/10/2017 PM 333 4.03 0.3 SHZ421 Classroom 211 3/6/2017 11:30 AM 326 3/10/2017 PM 320 4.03 0.1 SIF061 Classroom 213 3/6/2017 11:30 AM 263 3/10/2017 PM 254 4.03 0.6 SIL548 Classroom 304 3/6/2017 11:30 AM 554 3/10/2017 PM 546 4.03 0.3 SII863 Classroom 306 3/6/2017 11:30 AM 457 3/10/2017 PM 449 4.03 0.4 SIL349 Classroom 306 3/6/2017 11:30 AM 493 3/10/2017 All radon levels are expressed in picocuries per liter. PM 484 4.03 0.5 Duplicate 0.5

Survey Date: 3/6/17 to 3/10/17 page 13 of 22 Device Placement Start Stop SHZ609 Classroom 308 3/6/2017 11:35 AM 399 3/10/2017 PM 391 4.02 0.4 SIK953 Classroom 309 3/6/2017 11:35 AM 416 3/10/2017 PM 409 4.02 0.2 SII922 Classroom 307 3/6/2017 11:35 AM 303 3/10/2017 PM 297 4.02 0.1 SIL068 Classroom 305 3/6/2017 11:35 AM 397 3/10/2017 PM 389 4.02 0.4 SHZ372 Classroom 305 3/6/2017 11:35 AM 187 3/10/2017 PM 186 4.02-0.5 SIA464 Office 302 3/6/2017 11:40 AM 274 3/10/2017 PM 264 4.02 0.7 SJD086 Classroom 405 3/6/2017 11:40 AM 623 3/10/2017 PM 614 4.03 0.4 SJC964 Classroom 407 3/6/2017 11:40 AM 633 3/10/2017 PM 628 4.03 0.0 Below the lower limits of detection SJC869 Classroom 409 3/6/2017 11:40 AM 597 3/10/2017 PM 586 4.03 0.7 SHN748 Classroom 409 3/6/2017 11:40 AM 203 3/10/2017 All radon levels are expressed in picocuries per liter. PM 196 4.03 0.3 Duplicate 0.5

Survey Date: 3/6/17 to 3/10/17 page 14 of 22 Device Placement Start Stop SJD127 Classroom 410 3/6/2017 11:45 AM 589 3/10/2017 PM 579 4.02 0.6 SHX385 Classroom 408 3/6/2017 11:45 AM 241 3/10/2017 PM 233 4.02 0.4 SJD050 Classroom 404 3/6/2017 11:45 AM 635 3/10/2017 PM 631 4.03-0.2 Invalid. Please see Site Notes. SIK983 Office 501 3/6/2017 11:45 AM 376 3/10/2017 PM 369 4.03 0.3 SHX275 Classroom 504 3/6/2017 11:45 AM 238 3/10/2017 PM 234 4.03-0.1 Below the lower limits of detection SHX377 Classroom 507 3/6/2017 11:50 AM 316 3/10/2017 PM 311 4.03 0.0 Below the lower limits of detection SIK970 Classroom 508 3/6/2017 11:50 AM 390 3/10/2017 PM 382 4.03 0.4 SIF094 Classroom 509 3/6/2017 11:50 AM 396 3/10/2017 PM 387 4.03 0.5 SJC989 Classroom 511 3/6/2017 11:50 AM 538 3/10/2017 PM 529 4.03 0.5 SIA544 Classroom 511 3/6/2017 11:50 AM 396 3/10/2017 All radon levels are expressed in picocuries per liter. PM 385 4.03 0.8 Duplicate 0.7

Survey Date: 3/6/17 to 3/10/17 page 15 of 22 Device Placement Start Stop SIC089 Lounge 600 3/6/2017 12:00 PM 293 3/10/2017 PM 283 4.03 0.7 SJC822 Classroom 602 3/6/2017 12:00 PM 287 3/10/2017 PM 284 4.03-0.3 Below the lower limits of detection SII699 Classroom 604 3/6/2017 12:00 PM 427 3/10/2017 PM 415 4.03 0.9 SII706 Classroom 606 3/6/2017 PM 570 3/10/2017 PM 563 4.02 0.2 SHZ511 Classroom 608 3/6/2017 PM 211 3/10/2017 PM 203 4.02 0.4 SIA589 Classroom 607 3/6/2017 PM 331 3/10/2017 PM 319 4.02 0.9 SIA540 Classroom 605 3/6/2017 PM 338 3/10/2017 PM 332 4.02 0.1 SIA638 Classroom 603 3/6/2017 PM 271 3/10/2017 PM 260 4.02 0.8 SHZ440 Classroom 704 3/6/2017 PM 398 3/10/2017 12:50 PM 290 4.03 0.4 SIC104 Classroom 704 3/6/2017 PM 412 3/10/2017 All radon levels are expressed in picocuries per liter. 12:50 PM 403 4.03 0.5 Duplicate 0.5

Survey Date: 3/6/17 to 3/10/17 page 16 of 22 Device Placement Start Stop SHZ482 Classroom 706 3/6/2017 PM 377 3/10/2017 12:50 PM 370 4.03 0.3 SII924 Classroom 707 3/6/2017 PM 190 3/10/2017 12:50 PM 189 4.03-0.5 SIF123 Classroom 707 3/6/2017 PM 261 3/10/2017 12:50 PM 251 4.03 0.7 SIF381 Classroom 705 3/6/2017 12:15 PM 234 3/10/2017 12:50 PM 228 4.02 0.2 SIL373 Classroom 801 3/6/2017 12:15 PM 524 3/10/2017 12:55 PM 511 4.03 1.0 SIF134 Classroom 808 3/6/2017 12:15 PM 424 3/10/2017 12:55 PM 416 4.03 0.4 SIL277 Classroom 806 3/6/2017 12:15 PM 447 3/10/2017 12:55 PM 439 4.03 0.4 SIL552 Classroom 804 3/6/2017 12:15 PM 552 3/10/2017 12:55 PM 540 4.03 0.8 SIL021 Classroom 802 3/6/2017 PM 588 3/10/2017 12:55 PM 580 4.02 0.3 SIA408 Classroom 802 3/6/2017 PM 384 3/10/2017 All radon levels are expressed in picocuries per liter. 12:55 PM 377 4.02 0.3 Duplicate 0.3 Please see Site Notes.

Survey Date: 3/6/17 to 3/10/17 page 17 of 22 Device Placement Start Stop SJD110 East Gym- NW 900 3/6/2017 PM 533 3/10/2017 1:00 PM 525 4.03 0.3 SIF404 East Gym- SE 900 3/6/2017 PM 244 3/10/2017 1:00 PM 237 4.03 0.3 SHN930 Stage 3/6/2017 PM 304 3/10/2017 1:00 PM 299 4.03 0.0 Below the lower limits of detection SIF279 Stage-Paint 3/6/2017 PM 448 3/10/2017 1:00 PM 441 4.03 0.2 SJC865 Music 140 3/6/2017 12:25 PM 694 3/10/2017 PM 685 4.03 0.4 SJD018 Classroom 138 3/6/2017 12:25 PM 575 3/10/2017 PM 568 4.03 0.2 SIL467 Band 96 3/6/2017 12:25 PM 227 3/10/2017 PM 219 4.03 0.4 SJC909 Music Office 98A 3/6/2017 12:25 PM 640 3/10/2017 PM 629 4.03 0.7 SJD046 Music Storage 98 3/6/2017 PM 644 3/10/2017 PM 635 4.02 0.4 SJC890 Music Storage 98 3/6/2017 PM 396 3/10/2017 All radon levels are expressed in picocuries per liter. PM 387 4.02 0.5 Duplicate 0.5

Survey Date: 3/6/17 to 3/10/17 page 18 of 22 Device Placement Start Stop SIA677 Orchestra 98 3/6/2017 PM 210 3/10/2017 PM 202 4.02 0.4 SIF235 Storage 98B 3/6/2017 PM 414 3/10/2017 PM 404 4.02 0.6 SIL377 Storage 98A 3/6/2017 PM 602 3/10/2017 PM 592 4.02 0.6 SIF403 Storage 98C 3/6/2017 PM 417 3/10/2017 PM 410 4.02 0.2 SII427 Tech Lab 94 3/6/2017 PM 373 3/10/2017 1:15 PM 363 4.02 0.6 SHZ398 Tech Lab 94 3/6/2017 PM 184 3/10/2017 1:15 PM 184 4.02-0.7 SIL419 Tech Lab Office 94 3/6/2017 PM 418 3/10/2017 1:15 PM 407 4.02 0.8 SJD065 Tech Lab Storage A 94A 3/6/2017 PM 561 3/10/2017 1:15 PM 554 4.02 0.2 SIF119 Tech Lab Storage B 94 3/6/2017 12:45 PM 415 3/10/2017 1:15 PM 407 4.02 0.4 SIA524 Tech Lab Storage B 94 3/6/2017 12:45 PM 415 3/10/2017 All radon levels are expressed in picocuries per liter. 1:15 PM 408 4.02 0.2 Duplicate 0.3

Survey Date: 3/6/17 to 3/10/17 page 19 of 22 Device Placement Start Stop SIL322 Classroom 95 3/6/2017 12:55 PM 261 3/10/2017 1:15 PM 251 4.01 0.7 SJD061 Classroom 93 3/6/2017 12:55 PM 682 3/10/2017 1:15 PM 674 4.01 0.3 SJD054 Gym-NW 120 3/6/2017 12:55 PM 622 3/10/2017 PM 610 4.02 0.8 SIL512 Activity 120 3/6/2017 12:55 PM 445 3/10/2017 PM 435 4.02 0.6 SIA691 Gym-SE 120 3/6/2017 PM 261 3/10/2017 PM 253 4.01 0.4 SJC930 Gym Storage 128 3/6/2017 PM 650 3/10/2017 PM 638 4.01 0.8 SIL544 Library 208 3/6/2017 PM 727 3/10/2017 PM 716 4.01 0.6 SHZ479 Office 208 3/6/2017 PM 288 3/10/2017 PM 281 4.01 0.3 SIA587 Storage 208C 3/6/2017 PM 363 3/10/2017 PM 358 4.01 0.0 SII862 Storage 208C 3/6/2017 PM 468 3/10/2017 All radon levels are expressed in picocuries per liter. PM 461 4.01 0.2 Duplicate 0.1

Survey Date: 3/6/17 to 3/10/17 page 20 of 22 Device Placement Start Stop SII842 Library-N 208 3/6/2017 1:10 PM 462 3/10/2017 1:35 PM 454 4.02 0.4 SIL431 Recording 208 3/6/2017 1:10 PM 719 3/10/2017 1:35 PM 712 4.02 0.2 SIL476 Library-S 208 3/6/2017 1:10 PM 369 3/10/2017 1:35 PM 366 4.02-0.3 Below the lower limits of detection SHX208 Classroom 503 3/6/2017 1:15 PM 333 3/10/2017 1:35 PM 326 4.01 0.3 SIF046 Classroom 503 3/6/2017 1:15 PM 188 3/10/2017 1:35 PM 188 4.01-0.7 SHZ512 Storage 103 3/6/2017 PM 359 3/10/2017 PM 353 3.94 0.1 SIF168 Classroom 303 3/6/2017 PM 249 3/10/2017 12:15 PM 240 3.95 0.6 SIF173 Storage 301 3/6/2017 PM 264 3/10/2017 12:15 PM 256 3.95 0.4 SIF352 Classroom 406 3/6/2017 PM 447 3/10/2017 PM 442 3.95 0.0 SIK987 Classroom 406 3/6/2017 PM 486 3/10/2017 All radon levels are expressed in picocuries per liter. PM 481 3.95 0.0 Duplicate 0.0 Below the lower limits of detection

Survey Date: 3/6/17 to 3/10/17 page 21 of 22 Device Placement Start Stop SIL228 Office 500 3/6/2017 1:30 PM 384 3/10/2017 PM 375 3.95 0.5 SIC081 Office 500 3/7/2017 1:30 PM 562 3/10/2017 PM 561 2.95-0.5 SIF071 Classroom 505 3/7/2017 1:30 PM 304 3/10/2017 PM 294 2.95 1.2 SHX438 Classroom 506 3/7/2017 1:30 PM 230 3/10/2017 PM 225 2.95 0.3 SIA644 Classroom 506 3/7/2017 1:30 PM 390 3/10/2017 PM 389 2.95-0.5 SHZ404 Classroom 803 3/6/2017 1:40 PM 311 3/10/2017 12:55 PM 301 3.97 0.7 SIF207 Storage 800A 3/6/2017 1:40 PM 390 3/10/2017 PM 380 3.98 0.7 SIL351 Classroom 99 3/6/2017 1:45 PM 457 3/10/2017 1:20 PM 444 3.98 1.0 SIF048 Classroom 99 3/6/2017 1:45 PM 349 3/10/2017 1:20 PM 341 3.98 0.4 Duplicate 0.7 All radon levels are expressed in picocuries per liter.

Survey Date: 3/6/17 to 3/10/17 page 22 of 22 Appendix C: IEMA Professional License